Ethyl Acetate → cis 3a,4,5,7a-tetrahydro-2(3H)-benzofuranone

HRID 846530

반응식

HRID 846530 반응식
CC(C)[O-].[Al+3].CC(C)[O-].CC(C)[O-].[C:14]([CH2:19][CH:20]1[C:25](=[O:26])[CH:24]=[CH:23][CH2:22][CH2:21]1)([O:16]CC)=O.C(C(C(C([O-])=O)O)O)(O)=O.[Na+].C(OCC)(=O)C>C1(C)C=CC=CC=1>[O:26]1[C@H:25]2[CH:24]=[CH:23][CH2:22][CH2:21][C@H:20]2[CH2:19][C:14]1=[O:16]

참가 물질

6

반응물 4

HCID 8857Ethyl AcetateHCID 11143Aluminum isopropoxideHCID 13834278Ethyl (2-oxo-cyclohex-3-enyl)acetateHCID 23690454Sodium 3-carboxy-2,3-dihydroxypropanoate

생성물 1

HCID 11205783cis 3a,4,5,7a-tetrahydro-2(3H)-benzofuranone수율 86%

시약·촉매·용매 1

HCID 1140Toluene용매

반응 조건

온도
90 °C

실험 절차

To a solution of 13.5 g (66.0 mmoles) of aluminum isopropoxide in 100 ml of toluene was added 2.0 g (11.0 mmoles) of 6-(carbethoxymethyl)-2-cyclohexen-1-one at room temperature, and the solution was heated to 90° C. for 18 hours. The solution was cooled to room temperature, and aqueous saturated sodium hydrogen tartrate and ethyl acetate were added. The aqueous layer was extracted with ethyl acetate, and the combined ethyl acetate extracts were dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The crude material was purified by Kugelrohr distillation (bp 40°-80° C./0.01 mm Hg) to yield 1.3 g (86%) of cis 3a,4,5,7a-tetrahydro-2(3H)-benzofuranone, as confirmed by NMR and IR data.

후처리

  1. temperatureThe solution was cooled to room temperature
  2. extractionThe aqueous layer was extracted with ethyl acetate
  3. dry with materialthe combined ethyl acetate extracts were dried over anhydrous magnesium sulfate
  4. customevaporated under reduced pressure
  5. distillationThe crude material was purified by Kugelrohr distillation (bp 40°-80° C./0.01 mm Hg)

출처 및 근거

ORD 기록
ord-b2d6c0049ace41d3a351d491dc0f1323
출처 데이터셋
uspto-grants-1992_08
특허 번호
US05137035

연결된 노트

불러오는 중…